JPH04258314A - Device and method for taking up tip of band-shaped material - Google Patents

Abstract

PURPOSE:To easily take up a foil band to stably secure the internal peripheral dimension to be taken up by fitting a guide cover and a press roll movable freely forward and backward to a take-up spindle. CONSTITUTION:The tip of a metallic foil 5 is inserted between the take-up spindle 4 and the press roll 2, a loading/unloading mechanism 7 of the press roll 2 is advanced, the loading/unloading mechanism 6 of the guide cover 1 is advanced, further an opening/closing mechanism 12 is operated, segments 1a, 1b are closed to mount the guide cover 1 on the outer periphery of the take-up spindle 4. The tip of the metallic foil 5 is inserted from a slit part 3 into a clearance between the guide cover 1 and the takeup spindle 4. The take-up spindle 4 is rotated by a driving system 10 at a prescribed speed, the press roll 2 is driven and at the same time, the metallic foil 5 is fed further into the clearance between the cover 1 and the spindle 4. In the state that the restraint of the outer periphery of the metallic foil 5 is removed, compressed air is supplied into a rubber tube built in the spindle 4, the segments are expanded, the target dimension of the innermost periphery of a matter to be taken up is secured by sticking the spindle closely to the inner surface of the metallic foil 5.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tip winding device and a winding method for winding a strip of metal, paper, resin, etc. using a winding shaft.

0002

[Prior Art] Conventionally, when winding, for example, a foil-like band with a winding shaft, a tip winding device (method) has been proposed.
-95345 (see FIG. 2(a)), a flexible belt 32 made of rubber or the like is pressed against the winding shaft 31, the tip of the foil band 33 is sandwiched between the winding shaft and the belt, and the winding is performed. A winding type that winds by rotating the shaft and belt synchronously, or a winding type that is equipped with a vacuum suction or mechanical tip gripping mechanism 42 as seen in Japanese Utility Model Application No. 2-70829 (see Figure 2(b)). There is a type in which the tip of the foil-like band 43 is held and rotated around the shaft 41 to be wrapped.

0003

[Problem to be Solved by the Invention] A foil strip winding device generally has a cutting device, a joining device, a device for discharging the material to be wound, etc. around the winding shaft, and tends to become complicated. There is a strong demand for compactness and simplification. However, the conventional type described above requires a belt drive mechanism and a mechanism for gripping the foil strip on a rotating winding shaft, resulting in a complicated structure. In addition, when changing the winding diameter, the belt winding mechanism needs a mechanism to accommodate the size change, and it is necessary to prepare the number of winding shafts with tip gripping mechanisms corresponding to the size, which reduces equipment costs. As the size increases, the winding shaft and the like must be replaced each time the size is changed, resulting in problems such as an unavoidable decrease in winding productivity.

The present invention solves these problems with the conventional type, and provides an apparatus and method for winding the tip of a strip such as a foil strip, which can be easily made compact and simple.

[0005]

[Means for solving the problems] The first invention of the present invention is
A cylindrical shaft that can be opened and closed and has a belt-like winding shaft that can be expanded and contracted, and a slit that maintains a certain gap between the winding shaft drive device and the winding shaft and inserts and guides the material to be wound. a guide cover, an opening/closing device for the guide cover, and a presser roll that is movable forward and backward with respect to a winding shaft, and rotates to sandwich the strip by the winding shaft to feed the strip along the inner periphery of the guide cover. A second invention is a method for winding the leading end of a belt-shaped body implemented according to the first invention, in which the winding shaft is in a contracted state. Initial winding is performed by winding the tip of the thin strip, and after winding one or more times, the winding shaft is expanded to the target dimension and brought into close contact with the inner circumference to obtain the target dimension of the inner circumference of the strip. It is characterized by:

[0006]

[Operation] In the present invention, the leading end of the strip is supplied to the vicinity of the presser roll and the winding shaft by a separate supply device,
By sandwiching the strip between the presser roll and the winding shaft and rotating the winding shaft in the winding direction, the strip is fed into the gap between the guide cover and the winding shaft until the tip of the strip is 1
When the winding has stabilized after more than one rotation, the guide cover is retracted, and the following belt is held between the presser roll and the winding shaft, and the outer periphery of the wrapped belt is no longer restrained. The winding shaft is expanded to a target dimension, and the inner periphery is brought into close contact with the winding shaft to obtain the target dimension of the inner periphery of the strip body. after that,
A separately equipped joining device joins the outer periphery of the wound strip and the inner and side surfaces of the following strips that are in contact with it, making it possible to fix the inner periphery to the target size and wind it. Using a device with a simple structure, it is possible to wind thin strips such as foils at low cost, with high productivity, and with good accuracy on the inner circumference, making it possible to wind with stable inner and outer circumference dimensions. .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied as a device for winding the tip of a metal foil, which is a band-shaped body, will be described in detail with reference to the drawings. In FIG. 1(a), the guide cover 1 is composed of two approximately semicircular segments 1a and 1b that can form an inner circumference slightly larger than the diameter of the winding shaft so that the guide cover 1 can be attached to and removed from the winding shaft 4. has a structure that can be opened and closed with the connecting portion 1c as the center of rotation, and when closed, the tips of the segments 1a and 1b form a slit 3 having a width equal to or greater than the thickness of the metal foil so that the metal foil 5 can be inserted therein. Further, both segments 1a and 1b are connected to an attachment/detachment mechanism 6 having a segment opening/closing mechanism 12. A non-driven presser roll 2 is disposed at a position where the winding shaft 4 can be pressed against the slit portion 3, and this roll 2 is connected to the attachment/detachment mechanism 7. The winding shaft 4 has two segments 4a and 4b.
It has a split structure and is composed of a rubber tube 8 to which air pressure can be applied and a ring spring 9 for connecting and contracting the segments.The shaft end is rotatably supported and connected to a rotational drive system 10 such as an electric motor. It is also equipped with a rotation amount detector 11.

Next, the operation of the device using the tip winding mechanism will be described. A state in which the winding shaft 4 is contracted, a state in which the guide cover 1 is retracted and the segments 1a and 1b are opened,
The state in which the presser roll 2 is retracted is the origin of this device, and is shown in FIG. 1(b). From this state, the tip of the metal foil 5 is inserted between the winding shaft and the presser roll using a separately equipped feeding device. Next, advance the attachment/detachment mechanism 7 of the presser roll 2,
The metal foil 5 is sandwiched between the winding shaft 4 and the roll 2, the attaching/detaching mechanism 6 of the guide cover 1 moves forward, and the opening/closing mechanism 12 is further activated to close the segments 1a and 1b, thereby sealing the outer circumference of the winding shaft 4. The guide cover 1 is attached, and the tip of the metal foil 5 enters the gap between the guide cover 1 and the winding shaft 4 through the slit portion 3. From this state, the winding shaft 4 is rotated at a predetermined speed by the drive system 10, thereby the presser roll 2 is driven and the metal foil 5 is further fed into the gap between the guide cover 1 and the winding shaft 4. When the winding shaft 4 is temporarily stopped after rotating for about .5 turns, the metal foil 5 is wound around the winding shaft 4 for about 1.5 turns, and this state is shown in Fig. 1(c).
Shown below.

Next, the opening/closing mechanism 12 of the guide cover 1 is activated, the segments 1a and 1b are opened, and the attachment/detachment mechanism 6 is retracted, and the metal foil 5 is built into the winding shaft 4 with the outer periphery unrestricted. By supplying compressed air to the rubber tube 8, expanding the segments 4a and 4b, and bringing the winding shaft 4 into close contact with the inner surface of the metal foil 5, the target dimension of the innermost circumference of the material to be wound is secured. In this state, since the metal foil 5 is sandwiched between the presser roll 2 and the winding shaft 4, the metal foil 5 will not loosen. Furthermore, the overlapping portions of the metal foils 5 are joined together using, for example, a separately equipped spot welder, and the presser roll 2 is retracted by the attachment/detachment mechanism 7.

[0010] Through the above steps, the winding of the tip is completed, and as shown in Fig. 1 (
The state shown in d) is reached, and by rotating the winding shaft 4, the required amount of metal foil 5 can be wound up. Further, after winding, the air pressure of the rubber tube 8 built into the winding shaft 4 is released, and the segments 4a and 4b are pulled back by the ring spring 9 to contract, and the metal foil 5 is pulled out and dispensed. In this state, the device returns to its original state. In addition, when changing the winding diameter of the ribbon, it is only necessary to change the winding shaft of an arbitrary shaft diameter and the guide cover, and there is no need to change the drive equipment. In addition, when winding the metal foil with this device, a non-driven roll was used as a presser roll, the gap between the guide cover and the winding shaft was 0.5 mm, the plate thickness was 0.05 mm, and the plate width was 13 mm.
As a result of using 5mm metal foil to wrap a diameter of 25mm at a speed of 2mpm, it can be wrapped smoothly.
We were able to obtain a product with the target dimensions for both the inner and outer circumferences.

[0011] The cooperative operation of the winding shaft, presser roll, guide cover, joining device, etc. that constitute the device of the present invention may be controlled automatically in conjunction with each other, or may be performed semi-automatically or manually. It's okay.

0012

[Effects of the Invention] The present invention is highly effective when applied as a winding device for the tip of a foil strip such as metal foil even in a strip, and the guide cover and presser roll can be moved forward and backward with respect to the winding shaft. The foil strip can be easily wrapped by simply providing the foil strip, making it possible to create a compact and simple structure. Further, size changes can be handled at low cost by simply changing the sizes of the guide cover and winding shaft. In addition, since there are few replacement elements, the target dimension value of the innermost circumference can be stably obtained by expanding and contracting the winding shaft without reducing productivity, and winding with good dimensional accuracy on both the inner and outer circumferences can be achieved. This is something that can be achieved.

[Brief explanation of the drawing]

[Fig. 1] (a) is a three-dimensional explanatory diagram showing an overview of an embodiment of the tip winding device of the present invention, and (b), (c), and (d) are the process of winding a ribbon onto a winding shaft. FIG.

2A and 2B are schematic explanatory diagrams showing examples of prior art, in which (a) is a winding device using a belt, and (c) is a schematic explanatory diagram of a winding device in which a winding shaft grips the tip end.

[Explanation of symbols]

1 Guide covers 1a, 1b Segment 1c Connecting portion 2 Presser roll 3 Slit 4 Winding shafts 4a, 4b Segment 5 Metal foil 6 Guide cover attachment/detachment mechanism 7
Presser roll attachment/detachment mechanism 8
Rubber tube 9 Ring spring 10 Rotation drive system 11 Rotation amount detector

Claims (2)

[Claims] 1. A cylindrical guide that can be opened and closed, having a winding shaft that can be rotated to expand and contract, a winding shaft drive device, and a slit for inserting a strip while maintaining a certain gap between the winding shaft and the winding shaft. A cover, an opening/closing device for the guide cover, and a presser roll that is movable forward and backward with respect to a winding shaft and rotates to pinch the strip by the winding shaft to feed the strip along the inner periphery of the guide cover. A device for winding the tip of a thin strip-shaped body. [Claim 2] Initial winding is performed by winding the tip of the strip while the winding shaft is contracted, and after one or more windings, the winding shaft is expanded to a target dimension and brought into close contact with the inner periphery. A method for winding the tip of a band-shaped object, characterized in that a target dimension of the inner periphery of the winding is obtained by: